package com.heima.kafka;

import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.junit.Test;

import java.util.Properties;

public class ProduceQuickStart {
    @Test
    public void sendMsg(){
        //1.kafka的配置信息
        Properties properties = new Properties();

        //kafka的连接地址
        properties.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "120.27.213.138:9092");

        //发送失败，失败的重试次数
        properties.put(ProducerConfig.RETRIES_CONFIG,5);

        //消息key的序列化器
        properties.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG,
                "org.apache.kafka.common.serialization.StringSerializer");

        //消息value的序列化器
        properties.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG,
                "org.apache.kafka.common.serialization.StringSerializer");

        //2.生产者对象
        KafkaProducer<String, String> producer = new KafkaProducer<String, String>(properties);

        //封装发送的消息
        ProducerRecord<String, String> record = new ProducerRecord<>("itheima-topic", "100001", "hello kafka");

        //3.发送消息
        producer.send(record);

        //4.关闭消息通道，必须关闭，否则消息发送不成功
        producer.close();
    }
}
